Can I Get Veneers if I Have Bruxism? I Diligently Wear a Customised Occlusal Splint. (photo)

I would not choose composite over porcelain based on ease of repair, as the repair won't look very esthetic.  Porcelain will look lifelike and be much more durable while composites tend to look unnatural.  Many bruxers get porcelain veneers, and many don't wear their night guard (but if you DO, your odds of success go up dramatically).

Looking at the photos that you have provided I believe that you could have porcelain veneers despite your grinding (bruxism).  The preparation of the teeth would be minimal allowing for little, if any, porcelain to be on the surface of the teeth that is damaged from grinding.  In addition, you said that you have an occlusal splint that you wear nightly.  If your splint is for your upper teeth you will need a new one after your veneers are finished. As long as you continue to wear your splint you should be fine.  Hope this helps. 

I was just curious if you have any TMJ symptoms: facial pain, headaches, jaw popping, limited opening?

If you do then it would be prudent to consider having this evaluated for treatment and long term health.  Depending on how the teeth meet together on the back side, veneers are not necessarily contraindicated. If you can keep the veneers out of the bite then many times you will be fine and can enjoy veneers.  From the photo it looks like filling out or broadening your smile might be a nice esthetic consideration. 

Also, be sure that a strong porcelain such a Emax is used. This is not only strong but also very esthetic in the hands of skilled dentists and ceramists.

Ronald W. Konig DDS, FAGD, LVIF